/**
 * Copyright 2007 Jason Horman, Pete Aykroyd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.functor.expression;

public class False extends AbstractPredicateExpression {
	public static final False INSTANCE = new False();

	private False() {

	}

	public boolean isAlwaysFalse() {
		return true;
	}

	/** Returns a predicate that always returns false. */
	public static False get() {
		return INSTANCE;
	}

	public void toString(StringBuilder builder) {
		builder.append("false");
	}

	public int computeHashCode() {
		return 1;
	}

	public boolean equals(Object object) {
		return object instanceof False;
	}
}
